Thousands pay tribute at NYC World Trade Memorial
Sept 11 Anniversary
Credit: AP
In this photo of Sept. 16, 2001, Robert and Suzanne Peraza place a flyer about their son Robert David Peraza on a wall in New York. Robert David Peraza was on the 104th floor of tower 1 of the World Trade Center when it was hit by the first hijacked airplane during a terrorist attack Tuesday, Sept. 11, 2001. In a widely published photo, Robert Peraza is shown kneeling at the September 11 Memorial during the 10th anniversary ceremony, Sunday, Sept. 11, 2011. (AP Photo/The Cincinnati Enquirer, Craig Ruttle) MANDATORY CREDIT; NO SALES
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